Added docs on avoiding duplicate HTTP spans when using OTEL

[jamescrosswell]

DESCRIBE YOUR PR

Resolves getsentry/sentry-dotnet#4670

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• None: Not urgent, can wait up to 1 week+

SLA

cc: @Flash0ver

PRE-MERGE CHECKLIST

Make sure you've checked the following before merging your changes:

• Checked Vercel preview for correctness, including links
• PR was reviewed and approved by any necessary SMEs (subject matter experts)
• PR was reviewed and approved by a member of the Sentry docs team

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Project	Deployment	Preview	Comments	Updated (UTC)
develop-docs	Ready	Preview	Comment	Nov 3, 2025 10:20pm
sentry-docs	Ready	Preview	Comment	Nov 3, 2025 10:20pm

[codecov]

Bundle Report

Changes will decrease total bundle size by 11.43kB (-0.05%) ⬇️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
sentry-docs-client-array-push	10.16MB	-6 bytes (-0.0%) ⬇️
sentry-docs-server-cjs	12.84MB	-11.42kB (-0.09%) ⬇️

Affected Assets, Files, and Routes:

view changes for bundle: sentry-docs-server-cjs

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
1729.js	-3 bytes	1.74MB	-0.0%
../instrumentation.js	-3 bytes	1.07MB	-0.0%
9523.js	-3 bytes	1.04MB	-0.0%
../app/[[...path]]/page.js.nft.json	-3.8kB	846.79kB	-0.45%
../app/platform-redirect/page.js.nft.json	-3.8kB	846.71kB	-0.45%
../app/sitemap.xml/route.js.nft.json	-3.8kB	843.94kB	-0.45%

view changes for bundle: sentry-docs-client-array-push

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
static/chunks/pages/_app-*.js	-3 bytes	882.71kB	-0.0%
static/chunks/8321-*.js	-3 bytes	425.87kB	-0.0%
server/middleware-*.js	-6.46kB	1.0kB	-86.59%
server/middleware-*.js	6.46kB	7.46kB	645.5% ⚠️
static/0KZM6_eN6I0yfyZZzuVnS/_buildManifest.js (New)	684 bytes	684 bytes	100.0% 🚀
static/0KZM6_eN6I0yfyZZzuVnS/_ssgManifest.js (New)	77 bytes	77 bytes	100.0% 🚀
static/h902acP6UKNVYDStrOkIm/_buildManifest.js (Deleted)	-684 bytes	0 bytes	-100.0% 🗑️
static/h902acP6UKNVYDStrOkIm/_ssgManifest.js (Deleted)	-77 bytes	0 bytes	-100.0% 🗑️